Keyphrases
- subband
- error diffusion
- halftone images
- frequency domain
- inverse halftoning
- bit rate
- image quality
- filter bank
- gray scale
- image compression
- wavelet transform
- multiresolution
- feature vectors
- high frequency
- wavelet decomposition
- wavelet coefficients
- wavelet domain
- gray level
- visual quality
- continuous tone images
- discrete wavelet transform
- low pass
- data hiding
- spatial domain
- black and white
- rate distortion
- video coding
- image coder
- low frequency
- halftoning algorithm
- human visual system
- image coding
- entropy coding
- multiscale
- bitstream
- low bit rate
- original images
- video coder
- coding method
- perceptual quality
- human perception
- image segmentation
- color images
- high quality